You are going to need a high speed computer. Your computer needs to be able to run the platform for the webinar as well as the presentations that you are running such as slides, video or any other media. In addition, you may be recording your webinar on the same computer, although ideally, you should be doing this on a different one.
You want wired internet not WiFi. It makes a huge different. Obviously, you also need a fast connection because you are going to be streaming out to a big audience and you don’t want them to see a poor quality image or have audio that cuts out on important concepts.
The microphone you choose is also important. If you can spent $100 there are some really good quality microphones that plug in via USB and give you crystal clear audio – the Blue Yeti is one of those.
If you are broadcasting audio you are going to need a pair of headphones (or a headset with mic included) so that you don’t send out feedback from your speakers.
Invest in an HD webcam if your computer doesn’t already come with one. These days, anything professional is in HD and you want to be known as a professional during your webinars.
Lighting is also important. Good lighting can make you look even better on camera while bad lighting can make you look like an amateur.
Generally, this will be web based, so you don’t have to worry about buying it. However, some platforms do have plugins that must be installed.
You are going to need some kind of presentation software like PowerPoint in order to show your slides.
As previously mentioned, you ideally want to record on a separate computer than the one you are using to run the webinar. Otherwise, you may experience a maxed out CPU and internet brown-outs. But you also need recording software to record your presentation.